Recuperative furnace.



No. 898,410. PATENTED'SEPT. 8, 1908.

N. L. HEINZ. RECUPERATIVE FURNACE.

APPLIUATION FILED MAR'. 16, 1908.

3 EHIEETS-SHEET 1.

PATENTED SEPT. 8, 1908. N. L. HEINZ. v RECUPERATIVE FURNACE. APPLICATION FILED MAR. 1a, 1903.

- a BHBETS-8HEET z.

' PATENTED SBBT.8,1908. N. L. HEINZ.

' REGUPERATIVB FURNACE.

APPLICATION TILED MAR. 16, 190B.

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TV A!" To all-whom it may concern: i Be it known-that I, NICHOLAS L. HEINZ, of. 'La Salle, in the county of Lasalle and State "means of the Waste .NicnoLAs L. HEINZ, or LA 'SALLE, ILLINOIS.

I .IfvEOUPEB/ATIVE FU'BINACE.

- Specification 01' Letters Patent.

no; see-,41o.

Original application flledluly 29, 1907, Serial .of Illinois, have;invented certain new and useful Improvements in Recuperative Furnaces, of which the-following 1s a speclfication.

My invention-relates to furnaces having a working chamber arranged over a recu erative furnace for heating the ingoing air by chamber. H

Among the objects of. my improvements are, first, to rovide an air heater immediately under t e working chamber and connect it with the front thereof by valved fiu'es for furnishing andregulating a supply of hot air in the working chamber; and, second, to afford facilities for the proper-conducting of the products of combustion about a flue or.

chamber of the air heater for heatin the air I passing therein toward the working 0 amber.

zontal trated in the v ew.

A further object is to rovide the air heater with suitable openings or cleaning the flues and passages through the same.

I attainthese objects by themeans illusaccompanying drawings in which Figure 1 is a transverse, vertical section of a recu erative furnace containing my invention, t e section being taken at the line 1 1 of Fig. 2. Fig. 2 is a fragmentary view partly in front elevation and partly in longitudinal section taken on the line 2 2 of Fig. 1. Fig. 3 is a fragmentary horizontal section ,taken on the line 3 3of-Fig. 1,.showing a plan Similar si s marked on, the drawings refer to simi ar parts throughout the several views.

The working-chamber and the recuperative chamber, or air heater, are divided len thwise and'centrally by a vertical wall 4, an separated horizontally by heavy arches 5 with a coverin of cinder and. top plates 6. At the place of t e horizontal separation the vertica wall 4. is provided with a large horifiue 7 whose-upper. part rises some; what above the bottom of the working chamber and isprovided with orts 8 at intervals along the entire length which open into the lower part of the space in the working chamber'on both sides of the wall'4.- At one end of the working chamber and close to the bottom, it is provided with a large opening 10 on each side of the wall 4.

further end of the'chamber w V with an opening 12 on each side 0ft e vertiheat from the working Patented'Bept-S, recs.

No. 386,068. Divided and thilapplication filed larch 16, 1908. Serial No. 421,524.

The flue 11 leading from a gas cates with t e working chamber through the openings 10 and flue 7 by its ports 8.- The.-

gas entering throughthe opening 10 tends to rise in the causes it to-travel orizontall through to the ch is rovided cal wall 4 for the letting out of the products of combustion.

Broducer (not shown) communi- 60 workinglchamber and the pressure The part of the wall 4 which is below'the a arches 5. is provided with a series of thin arches 13 spannin the space between it and the outer side wa s 14 andextending along seen in Fig. 2. The space between these arches gradually increases from the bottom upward. At opposite ends of said lower part of wall 4 are rovided openings 15 through said wall. ese are connected by vertical flues 16 in said wall, so that the spaceinclosed between the outer walls 14 and each alternate pair of the arches 13 is connected through 0 enings 15 and flues16 and forms a mean ering flue. or chamber which gradually increases in transverse area from a point near the-bottom of the walls 14 to the arches- 5. Through the walls 14.an opening 17 is provided near the bottom and corresponding in size withthe lowermost of the openings 15', through the wall 4. The openings 17 are for the admission of air to such meanderin flue or chamber which constitutes what Iiave above denominated an the working chamber.

A series of tile flues l8 'a-re placed in the side walls 19 of the working chamber at suiti able intervals, being arranged opposite to the ports 8 of the flue 7, and connected with the air chambers immediately below the arches 5. The tile fiues are provided with 1prorts 20 of uniform size for admitting air om the air; heater tothe working chamber. They are also provided with valves 21 at the bottom for regulating the amount of air admitted to them. .The air being thus introduced in the vertical planes occupied by the ports 8 aids in the maintenance of a uniform pressure and movement of the gases throu hout all parts of the working chamber. air heaterwlth its valved fiues 18, having ports of uniform size, thus placed in the front "of the working chamber and at points in line I the entire length of the working chamber, as

so air chamber or heater immediately under with the gas ortsof the flue 7 constitutes the means w ereby the first object mentioned above is attained.

The outlet openings 12 empty into down flues 22 in the end walls 23 of the air heatingchamber, which communicate with the alternatespaces between the arches 13 and 'form a continuous meandering passage Way for the products of combustion around on the outside of the passage way marked Air on the drawings. The movements of the air and the products of combustion in their respec. tive courses through the air heater are in opposite directions as indicated by arrows, the air entering at the bottom and passing on upward into the most enlarged parts of the air chamber immediately under the [arches 5. This air chamber is connected by the passa es immediately below said arches at t e opposite ends of the furnace, as

' seen in Fig. 2. The air entering at the bottom is permitted to expand and caused to move onward sloweras it becomes hotter and until it reaches said largest part of the air chamber; and the products of combustion passing from the working chamber enter the flue space immediately under the to most of the thin arches 13, which forms t e bottom of said largest part of the air chamthe air passage toward and to the large flues 12 at t e-bottom which leads to a chimney (not shown) This construction constitutes themeans whereby the second object is attained, Itis distinguished from theprior art, 'so far as known to me, by the independent fluesfor-the products of combustion in their air heater being connected at their u per part with the .working chamber at the exit end and near the bottom through the opening 12 and being gradually diminished in cross-section area from the top part to the points where they connect with the large flues 24. These independent flues are also ber connected bythe vertical passages 16 whereby a uniform pressure of the hot air under the entirebottom of the working chamber is maintained.

along the lengt .of the furnace. They have ber and thence passes on downward about in transverse area used in conjunction with the air flue or chamscenic doors 26 for closing them. Through these openings a rake or scraper may be introduced for reaching all horizontal parts of the interior of the air chamber and flues for the products of combustion, for the .purpose of cleaning them of accumulated dust or soot.

What I claim is 1. An airheating chamber having a ver-' ticaldivision wall provided with openings through it at its opposite ends and vertical fiues connecting such openings, a series of arches separating the 'inclosed spaces at opposite sides of the division wall into alternate horizontal passages on lines between said openings through said well, in combination with a working chamber placed upon the air heating chamber and having inlet air fines and outlet 'flues for the products of combustion respectively connected with the horizontal passages of the air heating chambers."

2. An' air heating chamber having a vertical division wall provided with openings through it at its opposite ends and vertical fiues connecting such openings, a series of arches separating the inclosed, spaces at oposite sides of the division wall into alternate horizontal passages on lines between said openings through 'saidwall, having increase from the bottom upward, in combination -with a working chamber laced u on the ,air heating chamber and liaving" et air flues and outlet fines for the products of combustiomfzwpectiv ly.

3. An air heating cha ber having a vertical division wall provided with openings through it at its'opposite ends fiues connecting such openings, a series of arches se arating the inclosed spaces at oposite si es of the division wall into alternate orizontal passages on lines between said NICHOLAS L. HEINZ.

Witnesses: Q

' Enrrn A; ANDERSON,

FLORENCE B. HEAPHY.

and vertical and out et flues for 

